Bertram2 said:
Socke,
you know more about it, what is the dynamic range you typically get from a APS chip and what is it from a full frame 24X36 ?
Thanks,
bertram
It depends on the ISO setting, noise reduction reduces the dynamic range. In JPEG at lowest ISO the current Canon range produces measurable data between -4 and +3.5 EV with zero at RGB 14,14,14 lab luminance 4. The Nikon D2x goes to +3 at comparable settings. IMHO everything below -4 and beyond +3 will be lost in print.
If you get your exposure right, the dynamic range should be enough for a good print, if you rely on the films latitud to cover exposure errors you're as lost with digital as you are with slides
🙂
With RAW files we add yet another variable. The range is certainly better than with JPEGs, no wonder since JPEGs are 8 bit and RAW contains the full 12 bit of information per pixel.
Depending on the RAW converter you can salvage some of the highlights and a lot of the shadows so that you can get one more usable step out of it when slightly underexposing.
So in RAW you may get -4.5 to +3.5 but you have to make a decision what you want in print.
So I think we can say that digital SLRs and the one digital RF reached the DR of slides and are as critical to exposure as slides are.
On the minus side we have the dynamic range of slow slide film without the theoretical resolution and on the plus side we have ISO 1600 in colour without the grain even ISO 3200 is better than Delta 3200
🙂
But see for yourself in
Phil Askeys test of the Canon 5D
OTOH, if you see what good Canon lenses look like on a Canon FF sensor you know why Leica chooses a smaller sensor and Zeiss Ikon doesn't plan to sell a digital RF anytime soon. There is still a lot to do until we can use our rangefinder lenses on a digital sensor the size of film.
The two 24x36mm digital SLRs left are "good enough" for most purposes, but I don't think they are good enough for Velvia and Kodachrome aficionados and a projected slide will beat any digital projector hands down. Those are good enough for HDTV but worlds apart from a slide.
Medium Format has an advantage here, the MF users don't expect their cameras firing away at 5 or 8 frames per second. Therefor datatransport and processing speed is not that important and the designers can tune the chips involved to better quality instead of compromising for speed.
We will see what Leica has to offer, as far as I know they are going in the "slower but better" direction.